66 lines
2.2 KiB
JavaScript
66 lines
2.2 KiB
JavaScript
/* cookies.js */
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/*
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Example File From "JavaScript and DHTML Cookbook"
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Published by O'Reilly & Associates
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Copyright 2003 Danny Goodman
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*/
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// utility function to retrieve a future expiration date in proper format;
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// pass three integer parameters for the number of days, hours,
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// and minutes from now you want the cookie to expire; all three
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// parameters required, so use zeros where appropriate
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function getExpDate(days, hours, minutes) {
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var expDate = new Date();
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if (typeof days == "number" && typeof hours == "number" && typeof hours == "number") {
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expDate.setDate(expDate.getDate() + parseInt(days));
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expDate.setHours(expDate.getHours() + parseInt(hours));
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expDate.setMinutes(expDate.getMinutes() + parseInt(minutes));
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return expDate.toGMTString();
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}
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}
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// utility function called by getCookie()
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function getCookieVal(offset) {
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var endstr = document.cookie.indexOf (";", offset);
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if (endstr == -1) {
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endstr = document.cookie.length;
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}
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return unescape(document.cookie.substring(offset, endstr));
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}
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// primary function to retrieve cookie by name
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function getCookie(name) {
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var arg = name + "=";
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var alen = arg.length;
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var clen = document.cookie.length;
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var i = 0;
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while (i < clen) {
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var j = i + alen;
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if (document.cookie.substring(i, j) == arg) {
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return getCookieVal(j);
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}
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i = document.cookie.indexOf(" ", i) + 1;
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if (i == 0) break;
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}
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return null;
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}
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// store cookie value with optional details as needed
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function setCookie(name, value, expires, path, domain, secure) {
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document.cookie = name + "=" + escape (value) +
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((expires) ? "; expires=" + expires : "") +
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((path) ? "; path=" + path : "") +
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((domain) ? "; domain=" + domain : "") +
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((secure) ? "; secure" : "");
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}
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// remove the cookie by setting ancient expiration date
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function deleteCookie(name,path,domain) {
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if (getCookie(name)) {
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document.cookie = name + "=" +
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((path) ? "; path=" + path : "") +
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((domain) ? "; domain=" + domain : "") +
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"; expires=Thu, 01-Jan-70 00:00:01 GMT";
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}
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}
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